Stretch marks develop on the abdomen of pregnant women becuase of streching and rupture of the?

Stretch marks develop on the abdomen of pregnant women due to the stretching and rupture of collagen and elastin fibers in the skin. As the skin expands rapidly to accommodate the growing fetus, the underlying structures can become damaged, leading to the formation of stretch marks. These marks typically appear as reddish or purplish lines initially, eventually fading to a lighter color after childbirth. Other factors, such as genetics and hormonal changes, can also influence their development.